[PATCH] drm/amdgpu: Simplify IRQ vector request logic

Piotr Stankiewicz
2020-06-16T08:43:03Z

pci_alloc_irq_vectors() will handle fallback from MSI-X to MSI
internally, if necessary. So remove checks which determine if we are
dealing with MSI or MSI-X and rely on pci_alloc_irq_vectors() to do the
right thing.

Signed-off-by: Piotr Stankiewicz <piotr.stankiewicz@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 0cc4c67f95f7..2d68ad7d45d4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -248,17 +248,8 @@ int amdgpu_irq_init(struct amdgpu_device *adev)
adev->irq.msi_enabled = false;

if (amdgpu_msi_ok(adev)) {
- int nvec = pci_msix_vec_count(adev->pdev);
- unsigned int flags;
-
- if (nvec <= 0) {
- flags = PCI_IRQ_MSI;
- } else {
- flags = PCI_IRQ_MSI | PCI_IRQ_MSIX;
- }
/* we only need one vector */
- nvec = pci_alloc_irq_vectors(adev->pdev, 1, 1, flags);
- if (nvec > 0) {
+ if (pci_alloc_irq_vectors(adev->pdev, 1, 1, PCI_IRQ_MSI | PCI_IRQ_MSIX) > 0) {
adev->irq.msi_enabled = true;
dev_dbg(adev->dev, "using MSI/MSI-X.\n");
}
--
2.17.2